Apparatus for spinning artificial silk



Aug. 11, 1925.

H. KEMPF ET AL APPARATUS FOR SPINNING ARTIFICIAL SILK Filed April 1. 1924 Patented Aug. 11,1925.

UNITED STATES HUBERT KEMP}? AND AUGUST HARTMAN THE FIRM CUPRUM AKTIENGESELLSGEAFT, OF GLARUS, SWITZERLAND.

N, OF BARMEN, GERMANY, ASSIGNORS TO APPARATUS FOR SPINNING ARTIFICIAL SILK.

Application filed April 1, 1924. Serial No. 13,490.

To all whom it may concern Be it known that we, HUBERT KEMPF, a citizen of the Republic of Germany, reside ing at Barmen, Germany, and AUGUST HARTMANN, a citizen of the Republic of Germany, residing at Barmen, Germany, have invented certain new and useful Improvements in Apparatus for Spinning Artificial Silk; and we do hereby declare the following to be a clear, full, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

The present invention relates ments in apparatus silk.

Apparatus for spinning artificial silk according to the tension method are known in which the precipitation liquid is fed into a cylinder in the top part of the latter and approximately in the same elevation as the nozzle, whereupon this liquid flows slowly down inside the cylinder together with the not yet solidified threads, in order to pass thereupon together with the threads into a conical funnel in which the speed of the flow increases as the area decreases. Used precipitating liquid has been fed into this apparatus from below in order to pass through the apparatus in unison with the fresh precipitating liquid. The used precipitating liquid enters laterally above the edge of the funnel into the stream of the fresh precipitating liquid.

This known installation presented the advantage that at the beginning the flow oi the precipitating liquid is comparatively slow and its speed lncreases progressively only from the moment in which it enters the inserted conical funnel.

A disadvantage of the known installation consists in the fact that the entrance of the precipitating liquid fed from below does not always occur uniformly but often in a one-sided manner so that the bundles of threads issuing from the nozzles are frequently displaced to one side, whereby aults in the spinning process occur.

These disadvantages are overcome by the present invention without impairing the advantages of the known installation by introto improvefor spinning artificial ducing the whole precipitating liquid below the upper edge of the conical funnel insorted in the cylinder.

A constructional example of the subject matter of the present invention is illustrated on the accompanying drawing, in which:

Fig. 1 is a vertical section through the apparatus and Fig. 2 shows in an elevation an apparatus applied to a spinning installation.

The precipitating liquid supplied from below by the pipe d (Fig. 1) enters an annular chamber 0, and hits against the inner wall of the latter. It is distributed uniformly and passes, thereupon through the annular spaces fand 9 into a cylinder 1) from which it flows uniformly along the whole circumference over the upper lip and opening of a conical funnel e and is then discharged through the discharge tube t provided at the lower end of the funnel. A supply of fresh precipitating liquid from above into the cylinder Z) is not necessary, as the flow of the precipitating liquid through the annular space g in the upward direction Will cause a small portion of the liquid to rise in the cylinder 6 along the wall of the latter and to displace by degrees a portion of the precipitating liquid con tained therein, which liquid has already absorbed some of the solvent from the threads passing therethrough. This displacement of the precipitating liquid inside the cylinder 6 of the spinning apparatus and the thereby resulting renewal respectively is necessary as it absorbs the solvent for the cellulose from the threads and as the precipitation or the solidifying of the threads would be prevented if the precipitating liquid were too much saturated with the solvent. The movement of the precipitating liquid in the cylinder 1) is, however, exceedingly small as compared with the movement through the conical funnel e and this is necessary asotherwise the pulling out of the threads would occur too quickly so that the threads have not suficient time to solidify. The threads would be broken as they do not this case.

The spinning process iscarried out in the following manner:

Solution of cellulose is contained in the t It (Fig. 2) and the solution is suppossess suficient strength in plied to the spinnin apparatus by means of the pipe 1*. At t e end of the latter a paratus in which the precipitating liqu d moves only slowly (i. e. is almostat rest), the threads are somewhat drawn out within the space Ifarid solidify to some extent. Then they get into the conical funnel 6 made of glass in which the precipitating liquid, which flows at a higher rate, acts upon the threads and completes the drawing out of the threads which thereby completely solidify known winding device not illustrated on the accompanying drawings and are then further treated. u

The precipitatingliquid is contained in a storage tank a and flows from there through the pipes into a regulating vessel 4 having an overflow Z. By means of the latter the liquid level in the vessel w is kept at .the

1 same level. A tube :2: projects into the vessel w and leads to the pipe d. When the spinning apparatus is filled with pieciph rging' tating liquid and when the disc opening of the tube t is situated below the liquid level in 'w the whole spinning apparatus acts as a syphon and as long as the liquid level in the regulating vessel 'w re-' mains constant the precipitating liquid will continuously flow through the spinnin ap aratus with the same speed. The atter depends on the vertical difierence between a the water level in the regulating vessel w and the discharge of the ipe 2%, this difierence being a juste to a etermined amount. are drawn out by the winding device must be somewhat greater than the discharge velocity of the precipitating liquidfrom the discharge pipe 1% in order to obtain a suitable thread. 7

We claim:

1. In apparatus for spinnin artificial silk, a spinning head, a short cy der into which said head discharges, a hollow annusilk, 9. cylinder, a spinning After the threads have left the discharge tube t they are wound upon a- The speed at which the threads lar supply member surrounding the of said cylinder, closing-the same and discharging thereinto, and a funnel supported by said member. v

2. In apparatus for innin silk, a spinnin head, a cy der into which said head 'arges, means to peri herally supply all the precipitating liqui at the bottom of said cylinder, a funnel in-said cylinder through which the threads and precipitating liquid discharge, said funnel operating as a siphon-tic cause the 'liquid'to fill said cylinder around the spinning head.

3. In apparatus for sp' artificial h is a ing t ereinto, means to rip er sup all the pliilecipitating liquid at the bbtwm o f said cy der, a funnel supported in said cylinder with its lip above the int of supply of liquid to the cylinder, said funnel operating as a siphon to maintain said cylinder full of liquid. p

4. In apparatus for spinning artificial silk, a short cylinder, a spinning head discharging thereinto, a hollow annular memher on the bottom of said cylinder and discharging thereinto through an annular space, means to supply grecipitating liquid to said member, a funn supported in said member with its lip spaced from the inner wall of said cylinder, said funnel operat' as'a siphon to maintain the liquid in sai cylinder around the head. I

5. In apparatus for spinning artificial silk, a short cylinder, a spinning head discharging thereinto, a hollow annular member surrounding said cylinder and discharg-' trance of liquid to the cylinder, said funnel 7 operating as a siphon to draw the precipitating li uid through said member up into the cylin er and around said head.

.In testimony that we claim the foregoing as our invention, we have signed our names.

HUBERT KEMPF. AUGUST HARTMANN. 

